Д)5-х=4(х-3) ж)7-(2х+3)=9 е)5(х+4)+х=6

Question

Д)5-х=4(х-3)
ж)7-(2х+3)=9
е)5(х+4)+х=6

Answer 1

5-x=4x-12
4x+x=5+12
5x=17
x=17:5
x=3,4
==========
7-2x-3=9
4-2x=9
-2x=9-4
-2x=5
x=5:(-2)
x=-2,5
=========
5x+20+x=6
6x+20=6
6x=6-20
6x=-14
x=-14:6
x=-2 1/3

Answer 2

Д)5-х=4x-12
-x-4x=-12-5
-5x=-17
x=-17/-5
x=3.4
ж)7-(2х+3)=9
7-2х-3=9
4-2х=9
-2х=9-4
-2х=5
х=-2,5

Comments

5x+20+x=6
6x+20=6
6x=6-20
6x=-14
x=-14:6
x=-2 1/3